/*
 * Copyright (C) 2017 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package org.kie.j2cl.tools.di.ui.navigation.client.internal;

import org.kie.j2cl.tools.di.ui.navigation.client.ContentDelegation;

/** Instances of this class are passed to the {@link ContentDelegation}. */
public class DelegationControl {

  private final Runnable runnable;

  private boolean hasRun;

  public DelegationControl(Runnable runnable) {
    this.runnable = runnable;
  }

  /** Causes page navigation to proceed. */
  public void proceed() {
    if (!hasRun) {
      runnable.run();
      hasRun = true;
    } else {
      throw new IllegalStateException("proceed() method can only be called once.");
    }
  }

  public boolean hasRun() {
    return hasRun;
  }
}
